/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/13-privatized_19-publish-precision_unknown_1_pos.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:38:41,169 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:38:41,233 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 18:38:41,242 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:38:41,243 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:38:41,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:38:41,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:38:41,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:38:41,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:38:41,285 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:38:41,286 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:38:41,286 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:38:41,286 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:38:41,287 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:38:41,288 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:38:41,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:38:41,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:38:41,288 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:38:41,288 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:38:41,289 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:38:41,289 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:38:41,290 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:38:41,290 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:38:41,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:38:41,291 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:38:41,291 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:38:41,291 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:38:41,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:38:41,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:38:41,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:38:41,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:38:41,293 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:38:41,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:38:41,293 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:38:41,293 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:38:41,294 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:38:41,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:38:41,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:38:41,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:38:41,627 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:38:41,627 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:38:41,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/13-privatized_19-publish-precision_unknown_1_pos.i [2023-08-26 18:38:42,743 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:38:43,025 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:38:43,025 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_19-publish-precision_unknown_1_pos.i [2023-08-26 18:38:43,046 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af1a45a05/b07d439e85b947f0b1c4351f30c16826/FLAG444da1e1f [2023-08-26 18:38:43,061 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af1a45a05/b07d439e85b947f0b1c4351f30c16826 [2023-08-26 18:38:43,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:38:43,068 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:38:43,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:38:43,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:38:43,073 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:38:43,074 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229d3125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43, skipping insertion in model container [2023-08-26 18:38:43,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,120 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:38:43,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:38:43,420 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:38:43,448 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-26 18:38:43,450 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-26 18:38:43,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:38:43,511 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:38:43,511 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43 WrapperNode [2023-08-26 18:38:43,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:38:43,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:38:43,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:38:43,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:38:43,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,541 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,561 INFO L138 Inliner]: procedures = 162, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2023-08-26 18:38:43,562 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:38:43,562 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:38:43,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:38:43,563 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:38:43,569 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,589 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,597 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,598 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,601 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:38:43,602 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:38:43,602 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:38:43,602 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:38:43,602 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (1/1) ... [2023-08-26 18:38:43,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:38:43,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:38:43,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 18:38:43,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 18:38:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:38:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:38:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:38:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:38:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:38:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 18:38:43,681 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 18:38:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:38:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:38:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:38:43,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:38:43,683 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 18:38:43,787 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:38:43,788 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:38:44,003 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:38:44,011 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:38:44,011 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:38:44,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:38:44 BoogieIcfgContainer [2023-08-26 18:38:44,013 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:38:44,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:38:44,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:38:44,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:38:44,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:38:43" (1/3) ... [2023-08-26 18:38:44,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efb65f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:38:44, skipping insertion in model container [2023-08-26 18:38:44,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:38:43" (2/3) ... [2023-08-26 18:38:44,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efb65f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:38:44, skipping insertion in model container [2023-08-26 18:38:44,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:38:44" (3/3) ... [2023-08-26 18:38:44,020 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_19-publish-precision_unknown_1_pos.i [2023-08-26 18:38:44,037 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:38:44,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 18:38:44,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:38:44,101 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 18:38:44,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 154 flow [2023-08-26 18:38:44,203 INFO L124 PetriNetUnfolderBase]: 2/72 cut-off events. [2023-08-26 18:38:44,204 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:38:44,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 72 events. 2/72 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 65 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2023-08-26 18:38:44,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 154 flow [2023-08-26 18:38:44,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 131 flow [2023-08-26 18:38:44,218 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:38:44,230 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 131 flow [2023-08-26 18:38:44,234 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 131 flow [2023-08-26 18:38:44,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 131 flow [2023-08-26 18:38:44,262 INFO L124 PetriNetUnfolderBase]: 2/64 cut-off events. [2023-08-26 18:38:44,263 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:38:44,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 64 events. 2/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-08-26 18:38:44,264 INFO L119 LiptonReduction]: Number of co-enabled transitions 532 [2023-08-26 18:38:46,553 INFO L134 LiptonReduction]: Checked pairs total: 1556 [2023-08-26 18:38:46,553 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-26 18:38:46,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:38:46,569 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a07ecff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:38:46,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 18:38:46,570 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:38:46,570 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:38:46,570 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:38:46,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:46,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:38:46,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:38:46,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:46,575 INFO L85 PathProgramCache]: Analyzing trace with hash 260, now seen corresponding path program 1 times [2023-08-26 18:38:46,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:46,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126425430] [2023-08-26 18:38:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:46,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:38:46,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:46,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126425430] [2023-08-26 18:38:46,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126425430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:46,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:46,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:38:46,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942356403] [2023-08-26 18:38:46,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:46,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:38:46,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:46,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:38:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:38:46,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 133 [2023-08-26 18:38:46,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 43 flow. Second operand has 2 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:46,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:46,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 133 [2023-08-26 18:38:46,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:46,751 INFO L124 PetriNetUnfolderBase]: 16/68 cut-off events. [2023-08-26 18:38:46,751 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:38:46,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 68 events. 16/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 202 event pairs, 16 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 106. Up to 43 conditions per place. [2023-08-26 18:38:46,753 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 10 selfloop transitions, 0 changer transitions 0/16 dead transitions. [2023-08-26 18:38:46,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 16 transitions, 55 flow [2023-08-26 18:38:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:38:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:38:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 149 transitions. [2023-08-26 18:38:46,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601503759398496 [2023-08-26 18:38:46,767 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 149 transitions. [2023-08-26 18:38:46,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 149 transitions. [2023-08-26 18:38:46,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:46,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 149 transitions. [2023-08-26 18:38:46,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:46,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:46,783 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:46,785 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 43 flow. Second operand 2 states and 149 transitions. [2023-08-26 18:38:46,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 16 transitions, 55 flow [2023-08-26 18:38:46,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 16 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:38:46,789 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 34 flow [2023-08-26 18:38:46,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=34, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-08-26 18:38:46,794 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-08-26 18:38:46,794 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 34 flow [2023-08-26 18:38:46,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 68.5) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:46,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:46,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 18:38:46,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:38:46,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:38:46,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash 7945678, now seen corresponding path program 1 times [2023-08-26 18:38:46,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:46,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046712843] [2023-08-26 18:38:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:46,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:38:46,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:46,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046712843] [2023-08-26 18:38:46,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046712843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:46,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:46,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:46,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525798469] [2023-08-26 18:38:46,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:46,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:46,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:46,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:46,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:46,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 133 [2023-08-26 18:38:46,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:46,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:46,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 133 [2023-08-26 18:38:46,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:47,007 INFO L124 PetriNetUnfolderBase]: 19/67 cut-off events. [2023-08-26 18:38:47,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:38:47,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 67 events. 19/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 184 event pairs, 13 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 121. Up to 35 conditions per place. [2023-08-26 18:38:47,009 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 12 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2023-08-26 18:38:47,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 19 transitions, 70 flow [2023-08-26 18:38:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-08-26 18:38:47,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213032581453634 [2023-08-26 18:38:47,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-08-26 18:38:47,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-08-26 18:38:47,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:47,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-08-26 18:38:47,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,016 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 34 flow. Second operand 3 states and 208 transitions. [2023-08-26 18:38:47,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 19 transitions, 70 flow [2023-08-26 18:38:47,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 70 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:38:47,018 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 45 flow [2023-08-26 18:38:47,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=45, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-08-26 18:38:47,018 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2023-08-26 18:38:47,018 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 45 flow [2023-08-26 18:38:47,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:47,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:38:47,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:38:47,020 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:38:47,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash -954150173, now seen corresponding path program 1 times [2023-08-26 18:38:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:47,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219371932] [2023-08-26 18:38:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:47,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:38:47,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:47,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219371932] [2023-08-26 18:38:47,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219371932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:47,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:47,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:47,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996467290] [2023-08-26 18:38:47,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:47,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:47,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:47,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:47,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 133 [2023-08-26 18:38:47,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:47,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 133 [2023-08-26 18:38:47,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:47,122 INFO L124 PetriNetUnfolderBase]: 17/60 cut-off events. [2023-08-26 18:38:47,122 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:38:47,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 60 events. 17/60 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 167 event pairs, 17 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 121. Up to 46 conditions per place. [2023-08-26 18:38:47,123 INFO L140 encePairwiseOnDemand]: 131/133 looper letters, 10 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 18:38:47,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 15 transitions, 65 flow [2023-08-26 18:38:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2023-08-26 18:38:47,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-26 18:38:47,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 171 transitions. [2023-08-26 18:38:47,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 171 transitions. [2023-08-26 18:38:47,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:47,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 171 transitions. [2023-08-26 18:38:47,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,127 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 45 flow. Second operand 3 states and 171 transitions. [2023-08-26 18:38:47,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 15 transitions, 65 flow [2023-08-26 18:38:47,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 59 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:38:47,128 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-26 18:38:47,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-26 18:38:47,129 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-26 18:38:47,129 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-26 18:38:47,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:47,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:38:47,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:38:47,130 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:38:47,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:47,131 INFO L85 PathProgramCache]: Analyzing trace with hash -954150172, now seen corresponding path program 1 times [2023-08-26 18:38:47,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:47,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956514991] [2023-08-26 18:38:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:47,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:38:47,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:47,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956514991] [2023-08-26 18:38:47,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956514991] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:47,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:47,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:47,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751544746] [2023-08-26 18:38:47,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:47,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:47,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:47,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:47,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 133 [2023-08-26 18:38:47,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:47,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 133 [2023-08-26 18:38:47,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:47,220 INFO L124 PetriNetUnfolderBase]: 13/51 cut-off events. [2023-08-26 18:38:47,220 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:38:47,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 51 events. 13/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 13 based on Foata normal form. 5/54 useless extension candidates. Maximal degree in co-relation 96. Up to 37 conditions per place. [2023-08-26 18:38:47,221 INFO L140 encePairwiseOnDemand]: 131/133 looper letters, 7 selfloop transitions, 1 changer transitions 2/14 dead transitions. [2023-08-26 18:38:47,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 14 transitions, 57 flow [2023-08-26 18:38:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-08-26 18:38:47,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43358395989974935 [2023-08-26 18:38:47,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-08-26 18:38:47,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-08-26 18:38:47,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:47,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-08-26 18:38:47,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,225 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 173 transitions. [2023-08-26 18:38:47,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 14 transitions, 57 flow [2023-08-26 18:38:47,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:38:47,226 INFO L231 Difference]: Finished difference. Result has 22 places, 12 transitions, 34 flow [2023-08-26 18:38:47,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=34, PETRI_PLACES=22, PETRI_TRANSITIONS=12} [2023-08-26 18:38:47,226 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-26 18:38:47,227 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 12 transitions, 34 flow [2023-08-26 18:38:47,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:47,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:47,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:38:47,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:38:47,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash 485557343, now seen corresponding path program 1 times [2023-08-26 18:38:47,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:47,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670147935] [2023-08-26 18:38:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:38:47,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:47,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670147935] [2023-08-26 18:38:47,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670147935] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:47,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:47,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:38:47,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271360574] [2023-08-26 18:38:47,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:47,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:38:47,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:38:47,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:38:47,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 133 [2023-08-26 18:38:47,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 12 transitions, 34 flow. Second operand has 5 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:47,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 133 [2023-08-26 18:38:47,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:47,365 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2023-08-26 18:38:47,365 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:38:47,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 18 events. 2/18 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 5/23 useless extension candidates. Maximal degree in co-relation 40. Up to 10 conditions per place. [2023-08-26 18:38:47,366 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 3 selfloop transitions, 4 changer transitions 6/14 dead transitions. [2023-08-26 18:38:47,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 14 transitions, 62 flow [2023-08-26 18:38:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:38:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:38:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 207 transitions. [2023-08-26 18:38:47,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3890977443609023 [2023-08-26 18:38:47,367 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 207 transitions. [2023-08-26 18:38:47,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 207 transitions. [2023-08-26 18:38:47,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:47,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 207 transitions. [2023-08-26 18:38:47,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,370 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,370 INFO L175 Difference]: Start difference. First operand has 22 places, 12 transitions, 34 flow. Second operand 4 states and 207 transitions. [2023-08-26 18:38:47,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 14 transitions, 62 flow [2023-08-26 18:38:47,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 61 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:38:47,371 INFO L231 Difference]: Finished difference. Result has 22 places, 8 transitions, 32 flow [2023-08-26 18:38:47,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=32, PETRI_PLACES=22, PETRI_TRANSITIONS=8} [2023-08-26 18:38:47,372 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-26 18:38:47,372 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 8 transitions, 32 flow [2023-08-26 18:38:47,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:47,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:47,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:47,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:38:47,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:38:47,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1349792446, now seen corresponding path program 1 times [2023-08-26 18:38:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:47,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135026276] [2023-08-26 18:38:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:38:47,398 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:38:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:38:47,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:38:47,428 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:38:47,429 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (5 of 6 remaining) [2023-08-26 18:38:47,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-26 18:38:47,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-08-26 18:38:47,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-26 18:38:47,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-26 18:38:47,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2023-08-26 18:38:47,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:38:47,435 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-26 18:38:47,441 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:38:47,441 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:38:47,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:38:47 BasicIcfg [2023-08-26 18:38:47,460 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:38:47,460 INFO L158 Benchmark]: Toolchain (without parser) took 4392.78ms. Allocated memory was 381.7MB in the beginning and 499.1MB in the end (delta: 117.4MB). Free memory was 355.9MB in the beginning and 373.8MB in the end (delta: -17.9MB). Peak memory consumption was 100.7MB. Max. memory is 16.0GB. [2023-08-26 18:38:47,461 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 381.7MB. Free memory is still 358.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:38:47,461 INFO L158 Benchmark]: CACSL2BoogieTranslator took 441.64ms. Allocated memory is still 381.7MB. Free memory was 355.6MB in the beginning and 336.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 18:38:47,461 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.27ms. Allocated memory is still 381.7MB. Free memory was 336.7MB in the beginning and 334.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:38:47,462 INFO L158 Benchmark]: Boogie Preprocessor took 38.61ms. Allocated memory is still 381.7MB. Free memory was 334.6MB in the beginning and 333.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:38:47,462 INFO L158 Benchmark]: RCFGBuilder took 411.63ms. Allocated memory is still 381.7MB. Free memory was 333.1MB in the beginning and 319.8MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 18:38:47,463 INFO L158 Benchmark]: TraceAbstraction took 3444.97ms. Allocated memory was 381.7MB in the beginning and 499.1MB in the end (delta: 117.4MB). Free memory was 319.0MB in the beginning and 373.8MB in the end (delta: -54.8MB). Peak memory consumption was 62.9MB. Max. memory is 16.0GB. [2023-08-26 18:38:47,464 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 381.7MB. Free memory is still 358.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 441.64ms. Allocated memory is still 381.7MB. Free memory was 355.6MB in the beginning and 336.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 49.27ms. Allocated memory is still 381.7MB. Free memory was 336.7MB in the beginning and 334.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.61ms. Allocated memory is still 381.7MB. Free memory was 334.6MB in the beginning and 333.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 411.63ms. Allocated memory is still 381.7MB. Free memory was 333.1MB in the beginning and 319.8MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 3444.97ms. Allocated memory was 381.7MB in the beginning and 499.1MB in the end (delta: 117.4MB). Free memory was 319.0MB in the beginning and 373.8MB in the end (delta: -54.8MB). Peak memory consumption was 62.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 66 PlacesBefore, 23 PlacesAfterwards, 64 TransitionsBefore, 20 TransitionsAfterwards, 532 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 1 ChoiceCompositions, 60 TotalNumberOfCompositions, 1556 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 809, independent: 679, independent conditional: 0, independent unconditional: 679, dependent: 130, dependent conditional: 0, dependent unconditional: 130, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 310, independent: 280, independent conditional: 0, independent unconditional: 280, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 809, independent: 399, independent conditional: 0, independent unconditional: 399, dependent: 100, dependent conditional: 0, dependent unconditional: 100, unknown: 310, unknown conditional: 0, unknown unconditional: 310] , Statistics on independence cache: Total cache size (in pairs): 47, Positive cache size: 35, Positive conditional cache size: 0, Positive unconditional cache size: 35, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: assertion can be violated assertion can be violated We found a FailurePath: [L681] 0 int glob1 = 0; [L682] 0 pthread_mutex_t mutex1 = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L683] 0 pthread_mutex_t mutex2 = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L696] 0 pthread_t id; [L697] FCALL, FORK 0 pthread_create(&id, ((void *)0), t_fun, ((void *)0)) VAL [arg={0:0}, glob1=0, id={5:0}, mutex1={3:0}, mutex2={4:0}, pthread_create(&id, ((void *)0), t_fun, ((void *)0))=-1] [L687] 1 glob1 = 5 VAL [arg={0:0}, arg={0:0}, glob1=5, mutex1={3:0}, mutex2={4:0}] [L699] CALL 0 __VERIFIER_assert(glob1 == 0) [L19] COND TRUE 0 !(cond) [L19] CALL 0 reach_error() [L18] COND FALSE 0 !(0) [L18] 0 __assert_fail ("0", "13-privatized_19-publish-precision_unknown_1_pos.c", 3, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, glob1=5, mutex1={3:0}, mutex2={4:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 697]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 88 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.3s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 65 IncrementalHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 2 mSDtfsCounter, 65 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=2, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 108 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-26 18:38:47,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...